Method of attaching glass kbtobs to metallic sockets



June 1, 41915.

DRAWING A careful search has been made this day for the original drawingor a. photolithographic copy of the same,

for the purpose of reproducing the said drawing to form a part of thisbook, but at this time nothing can be found from which a reproductioncan be made.

Finis D. Morris,

Chief of Division B.

AWK,

OFFIOE.

METHOD OF ATTACHING GLASS KNOBS T0 METALLIC SOCKETS.

Specification of Letters Patent No. 434, dated October 20, 1837.

To all whom it may concern:

Be it known that we, Enoorr ROBINSON and GEORGE W. RoBrNsoN, both of thecity of Boston, in the county of Suffolk and State of Massachusetts,machinists, have invented a new and useful Improvement in Making GlassDoor and other Knobs; and we do hereby declare that the following is afull and exact description thereof.

The glass knob is made in the common form except that near the foot andround the neck a groove or channel is made, either in the originalmanufacture of the knob, or afterward cut, which may be from a sixteenthto an eighth of an inch in depth, or more or less according to the sizeof the knob; if the foot of the knob is round, this groove maybe cutinto some angular or polygonal form to prevent the knob from turning inthe socket, but if the foo-t of the knob be angular or polygonal thegroove may be of even depth all round. The neck of the knob so far as itis covered by the socket must be of the same diameter with the foot. Theknob thus formed is to be inserted to the depth of an inch, more orless, into a metal socket of which the upper part or edge is just largeenough to receive the foot and neck of the knob, but the lower part ofthe cup of the socket must be made larger, that is the cavity must be ofgreater diameter than-the foot and neck of the knob, so as to leave aspace between the knob and the socket greatest at the bottom anddiminishing to nothing toward the top or edge of the socket where itmust fit close to the neck of the knob. A hole is to be made through theside of the socket so as to meet the groove in the neck of the knob,

when the knob is inserted; thi hole may be from an eighth to threesiXteent-hs of an inch in diameter or more if necessary to socket, andthen melted tin or other metal A is to be poured into the hole in theside of the socket until it has filled the groove in the knob, and thespace between the knob and the socket; by this melted metal the knobandthe socket are securely fastened together.

The bottom of the socket should be made of a thickness sufiicient toadmit of a hole being drilled through the side to receive a pin by whichthe socket may be fastened to the shaft passing into the lock or door.

We claim as our invention- Only the combination and fastening of themetal socket and glass knob by means of melted metal introduced betweenthem, and the adaptation of the forms of the knob and socket to effectthat purpose in any manner similar in principle to the one abovedescribed.

In the drawing accompanying this specification, A A is the glass knob,B, B, B, is

the socket, 0 is the groove in the neck of the knob, (Z is the hole intowhich the melted metal is poured, and e is the hole for the pin tofasten the socket to the shaft.

ENOOH ROBINSON. G. W. ROBINSON. Witnesses FRANKLIN VEXTER, J. L.ENGLISH,

